Green For All 2008 (Clip 1) with Majora Carter, Van Jones. Moderated by Ira Magaziner.

Green For All 2008 (Clip 2) with Majora Carter, Van Jones. Moderated by Ira Magaziner.

Green For All 2008 (Clip 3) with Majora Carter, Van Jones. Moderated by Ira Magaziner.

Environment and Security 2008 (Clip 1) with Alexander Karsner, Amory Lovins, Gale Norton, Robert Williams. Moderated by Michael Totten.

Environment and Security 2008 (Clip 2) with Alexander Karsner, Amory Lovins, Gale Norton, Robert Williams. Moderated by Michael Totten.

Rethinking Cities 2008 (Clip 1) Jim Kunstler introduced by Tim Appenzeller.

Rethinking Cities 2008 (Clip 2) Jim Kunstler introduced by Tim Appenzeller.

Living With Coal 2008 (Clip 1) with Jim Rogers, Randy Udall, Robert Williams. Moderated by Tim Appenzeller.

Living With Coal 2008 (Clip 2) with Jim Rogers, Randy Udall, Robert Williams. Moderated by Tim Appenzeller.

Environment, Power, and Politics with Kit Batten, Frances Beinecke, Ira Magaziner. Moderated by Andrew Revkin (Clip 1).

Environment, Power, and Politics with Kit Batten, Frances Beinecke, Ira Magaziner. Moderated by Andrew Revkin (Clip 2).

How Much Time to Act on Climate Change? with Abby Joseph Cohen, Lara Hansen, Timothy Wirth, Cathy Zoi. Moderated by Juliet Eilperin (Clip 1).

How Much Time to Act on Climate Change? with Abby Joseph Cohen, Lara Hansen, Timothy Wirth, Cathy Zoi. Moderated by Juliet Eilperin (Clip 2).

What is a Sustainable Business? with Elizabeth A. Lowery, Thomas Mooney, Megan Guy, Auden Schendler. Moderated by Joel Makower.

Plan B, 3.0 with Lester Brown. Introduction by Sam Champion. Lester Brown's plan for environmental stewardship.

Plan B, 3.0 with Lester Brown. Introduction by Sam Champion. Lester Brown on getting the market to tell the environmental truth.

Opening Plenary Session speakers Majora Carter and Josh Dorfman share big ideas about modern society and its relationship to the environment.

Opening Plenary Session speakers J. Carl Ganter of Circle of Blue and David Malakoff of NPR discuss big ideas in the world of natural resources and climate change.

Colorado Governor William Ritter welcomes attendees. Ritter discusses changing attitudes toward conservation in Colorado and throughout the nation.

The Human Footprint with speakers Amy Coen, Jerome Ringo and Dorceta Taylor. Elizabeth Vargas moderates.

Diversity of Life and Creation: Tim Appenzeller interviews E.O. Wilson (Clip 1).

Diversity of Life and Creation: Tim Appenzeller interviews E.O. Wilson (Clip 2).

Diversity of Life and Creation: Tim Appenzeller interviews E.O. Wilson (Clip 3).

Circle of Blue with speakers J. Carl Ganter and Charles Vorosmarty. Introduction by Jack Riggs. The importance of water to life on Earth, and the stories we tell about it.